Renee W.Y. Chan a, b, c, Kate C. Chan a, Kathy Y.Y. Chan a, Grace C.Y. Lui d, Joseph G.S. Tsun a, b, Rity Y.K. Wong d, Michelle W.L. Yu a, e, Maggie H.T. Wang f, Paul K.S. Chan g, Hugh Simon Lam a, Albert M. Li a, b, ⁎ 
a Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong.
b CUHK-UMCU Joint Research Laboratory of Respiratory Virus & Immunobiology, Faculty of Medicine, The Chinese University of Hong Kong
c Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong
d Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong
e Department of Paediatrics, Prince of Walres Hospital, Hong Kong
f Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong
g Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong